Add option to colour matching portion of results.

This was done by breaking the selected result into three parts, and
rendering each separately. A side-effect is that ligatures split when a
match ends inside them, but I think that's the correct behaviour (rather
than highlighting the whole ligature).

There may be issues with some non-latin languages that make much more
extensive use of ligatures / combining characters, however.

3 files changed, 18 insertions, 0 deletions

diff --git a/doc/config b/doc/config
index eb360e4..454f275 100644
--- a/doc/config
+++ b/doc/config
@@ -42,6 +42,9 @@
 	# Selection text
 	selection-color = #F92672
 
+	# Matching portion of selection text
+	selection-match-color = #00000000
+
 	# Selection background
 	selection-background = #00000000
 
diff --git a/doc/tofi.5.md b/doc/tofi.5.md
index 539b525..c922fac 100644
--- a/doc/tofi.5.md
+++ b/doc/tofi.5.md
@@ -94,6 +94,14 @@ options.
 >
 > Default: \#F92672
 
+**selection-match-color**=*color*
+
+> Color of the matching portion of the selected result. Any color that
+> is fully transparent (alpha = 0) will disable this highlighting. See
+> **COLORS** for more information.
+>
+> Default: \#00000000
+
 **selection-padding**=*px*
 
 > Extra horizontal padding of the selection background. If *px* = -1,
diff --git a/doc/tofi.5.scd b/doc/tofi.5.scd
index 8341200..3993e78 100644
--- a/doc/tofi.5.scd
+++ b/doc/tofi.5.scd
@@ -85,6 +85,13 @@ options.
 
 	Default: #F92672
 
+*selection-match-color*=_color_
+	Color of the matching portion of the selected result. Any color that is
+	fully transparent (alpha = 0) will disable this highlighting.
+	See *COLORS* for more information.
+
+	Default: #00000000
+
 *selection-padding*=_px_
 	Extra horizontal padding of the selection background. If _px_ = -1,
 	the padding will fill the whole window width.